Regional planning aiming at promoting development and decreasing inequality is considered among important issues in developing countries. Necessary for regional planning is to identify the position of regions toward each other with respect to development. Decreasing inequality in enjoyment of national resources, findings and facilities is one of the basic criteria for development. In addition to growth in all directions, the concept of development involves balanced distribution. The balanced distribution of facilities and services is a step toward removing regional differences and proportionate distribution of population in a region.
The Balanced development of geographical spaces requires accurate and comprehensive examination of economical, social and cultural issues, better recognition of society needs and their improvement. Therefore, ranking of regions based on enjoyment of various development indices is of common criteria in regional development.
Balanced development of geographical spaces requires investigating economical, social, cultural issues carefully and completely and knowing society needs better and improving them. These are subject to the availability of complete, processed statistical data concerning mentioned regions. The way facilities and services distributed in the regions become apparent through comparatively investigating different economical, social and spatial indexes in different regions in comparison. Indices may reveal the condition of different geographical areas comparatively and they may rank and prioritize these regions in terms of facilities and shortages (Zali, 1379, p.5). Lack of balance in the procedure of development causes creating gap among regions and intensifying regional inequalities, which in turn, is considered as a barrier on the path of development. Therefore, to study socio-economical inequalities among country or province regions is of essential and basic measures in economical growth together with social justice, affecting the allocation of resources with the aim of solving regional inequalities.